Apparatus for refrigeration



June 19, 1945.

J. FARAGO APPARATUS FOR REFRIGERATION Filed Dec. 7, 1939 A .7 TOA /VX1653 Patented June 19, 1945 UNITED STATES PATENT OFFICE APPARATUS FOR REFRIGERATION Julius Farag, Budapest, Hungary; vestedin the Alien Property Custodian Application December 7, 1939, Serial No. 308,027 In Germany February 24, 1939 2 Claims.

duction of the required degree of vacuum to suitably operate such a system by utilization of the reduction of pressure present in the intake pipe or manifold or an internal combustion engine during operation thereof. In the accompanying drawing, there is shown an example of the manner in which the invention may be applied to an internal combustion motor of the four cycle type. The drawing is a longitudinal sectional view showing diagrammatically the essential features of the invention.

In the accompanying drawing, the reference character I designates an evaporating chamber to which water may be supplied constantly or intermittently through a supply pipe 5.

Leading from the evaporating chamber I, there is a conduit 2, which leads to the intake port of an internal combustion motor 3. Interposed in the conduit 2 at spaced intervals, there are in the present embodiment of the invention, two air injectors illustrated diagrammatically at 4 in the drawing. These injectors are of such type that as the pressure in the conduit 2 falls below atmosphere, air will be introduced into the conduit by means of these injectors 4.

At the motor, the conduit 2 is provided with a valve 1, which is opened and closed mechanically in any suitable manner by the motor.

interposed in the conduit 2, there are two pressure equalizer chambers 10, there being one interposed between the two air injectors 4, the other being interposed between one of the air injectors 4 and the internal combustion motor 3. The chambers III are or such size in relation to the capacity of the motor 3, and the size of the injector passages of the air injectors 4, that the pressure produced in chambers l0, during the time that valve 1 is, open, is sufliciently low, that flow of air from ejectors 4, when valve I is closed, will not be great enough to raise the pressure in chambers III to atmospheric pressure before valve 1 opens.

The operation of the apparatus will now be described.

As the internal combustion motor 8 operates,

the suction stroke of its piston serves to reduce the pressure in the conduit 2, it being understood that the valve operating mechanism heretofore described is so arranged that upon the start of the suction stroke, the valve 1 will be opened. This arrangement of the valve 1 causes the piston to act directly upon the conduit 2 reducing the pressure therein and setting up an evaporation in the chamber I due to the reduction of pressure therein. The reduction of pressure in the conduit 2 is augmented by the injection of air at high velocities through the injectors 4, it be ing remembered that these injectors are in communication directly with the atmosphere. By this arrangement, the piston of the internal com- -bustion engine also serves to draw air through the injectors 4 at high velocities and thus augment the reduction of pressure in the conduit 2 at points between the injectors 4 and the chamber I. v

The foregoing operation produces a reduction or pressure within the chamber l setting up a suflicient degree of evaporation therein to produce the desired refrigerating or cooling efl'ect.

I claim:

1. A system for refrigeration comprising in combination, an evaporator, an internal combustion motor, a pipe line establishing communication between the evaporating chamber and the intake valve of the internal combustion motor whereby the piston of the internal combustion motor upon its intake stroke, eflects a reduction of pressure in the evaporating chamber, and means in said pipe line for augmenting the pressure reducing action of the motor piston, said means including a plurality of air injectors arranged in spaced relation and having communication with the interior of the pipe line and atmosphere.

2. A system for refrigeration comprising in combination, an evaporator, an internal combustion motor, a pipe line establishing communication between the evaporating chamber and the intake valve of the internal combustion motor whereby \the piston of the internal combustion motor upon its intake stroke, effects a reduction of pressure in the evaporating chamber, and means in said pipe line for augmenting the pressure reducing action of the motor piston, said means including a plurality of air injectors arranged in spaced relation and having communication with the interior of the pipe line and atmosphere, and a plurality of expansion chambers in said pipe line and disposed in alternate relation with the air injectors.

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